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In the figure, three thin plastic rods form
quarter-circles with a common center of
curvature at the origin. The uniform charges on
the three rods are Q = 30 nC, Q, = 3•Q1, and
Q3 = 8.Qj. What is the net electric potential at
the origin due to the rods? Give your answer in
volt. (ke = 1/4ne, = 9.0 x 10° Nm²/C?)
y (cm)
4.아
2.0
1.0
- x (cm)
%3D

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